Production of petroleum jelly



r' v 2,828,248 Ice Patented Mar. 255 1958 PRODUCTION OF PETROLEUM JELLYClaims priority, application Great Britain December 30, 1953' 3 Claims.(Cl. 196-449) This invention relates to the production of petroleumjelly.

At the present time, petroleum jelly is largely obtained as the residueremaining after the distillation of substantially non-asphaltic crudeoils. The principal object of the present invention is to enablesatisfactory petroleum jellies to be prepared from asphaltic crude oils.

It has been found that this object may beachieved by blending togethercertain oil components and certain oilwax mixtures, commonly referred toas slack waxes, that are obtained in the production of lubricating oilsfrom petroleum.

According to the present invention, a petroleum jelly comprises. amixture in approximately equal proportions of a residual oil (brightstock) having a viscosity index of not greater than 90, and preferablybetween 80 and 90, and a viscosity at 140 F. greater than 150centistokes, and a slack wax derived from a residual oil (bright stock)having a penetration unworked of 50-90 mm./ 10, an oil content of O-%,and a congealing point of 148-170 F.

According to a further feature of the invention, the residual oil may beused in admixture with a distillate oil having a viscosity index of65-80 and a viscosity at 140 F. of to 50 centistokes, the distillate oilconstituting up to 70% of the mixture.

According to a still further feature of the invention, the residual oilslack wax may be used in admixture with a slack wax derived from adistillate oil boiling above 480 F., and having an oil content of O% anda congealing point of 125-150" F.

The invention will now be described with reference to the followingexamples. Throughout the examples, the following blending componentswere used.

BRIGHT STOCK OIL S. G. 60/60 F 0.9255 Kinematic viscosity 140 F cs 176.1Viscosity index 85 DISTILLATE OIL S. G. 60/60 F 0.916

Kinematic viscosity 140 F cs 39.72

1 Institute of Petroleum Test 1. P. 50/48.

2 DISTILLATE OIL SLACK WAX Congealing point F 134 Oil content percentwt... 23.7

Example 1 Blends containing equal proportions 'by' weight of the brightstock oil and various bright stock slack waxes had the followingproperties;v

TABLE 1' Penetration at 25 0. Change in Melting r Penetra- Slack WaxNo.'Point of tionon Blend Un- Worked, Working, C. worked, mm./10 mm./10

mmL/lO' Example 2 Blends containing equal proportions by weight of thebright stock oil and the distillate oil, and various proportions ofbright stock slack wax, had the following properties.

TABLE 2 v Penetration at 259 C. Change in Percent; Melting Penetra-Slack Wax Weight Point of tion on No. of Slack Blend, Un- Worked,Working,

Wax 0. Worked, mm./1O mm./10

mmJlO (Repeat Blend) 2 50 72 183 273 90 4 50 69 192 277 85 73 144 224 7574 157 248 91 75 76 122 235 113 From a comparison of the data presentedin Tables 1 and 2 it will be seen that when using bright stock slack waxNo. 3, the blend comprising a mixture of bright stock oil and distillateoil gave a considerably smaller change in penetration on working thanthe blend comprising only the bright stock oil.

Example 3 The following table shows the effect of prolonged working ontwo blends according to the invention as compared with a petroleum jellyat present on the market.

The following table gives the properties of two jellies consisting of ablend of bright stock slack wax, distillate oil slack wax, bright stockoil, and distillate oil.

TABLE 4 Un- Worked Melting worked Penetra- Change Composition Point,Penetration at in pene- 0. tion at 25 0., tration, 25 0., mm./10 rum/lmm./

Bilggot Stock Slack Wax No, Distillate ()iTiYWk" 20% wt 203 247 44Distillate Oil, 25% Wt.-- Bright Stock Oil, 25% Wt---. Bright StockSlack Wax No.

4, 34% Wt Di2s6till%$% Oil Slack Wax, 6&0 172 220 48 Distil1ate 6il 2(l% 'v'v'III II 7 Bright Stock Oil, 20% Wt.

Distillate Oil Slack Wax, 50%

Wt Granular composition w1th little resem- Distillate Oil, 25% Wt blanceto petroleum elly, Bright Stock Oil, 25% Win--- It will be seen from thedata presented in Table 4, that blends comprising both bright stock andd istillate oil slack waxes, and both bright stock and distillate oilsgave the least change in penetration on working;

:We claim:

1. A petroleum jelly consisting of a mixture of a residual oil (brightstock) having a viscosity index of 80 to 90 and a viscosity at 140 F.greater than 150 centistokes,

a distillate oil having a viscosity index of 65 to 80 and 480 F., andhaving an oil content of 0-40% and a congealing point of 125' to 150F.,'the combined amounts of said residual and distillate oils amountingto between 40 and of the mixture.

2. A petroleum jelly consisting of a mixture of 25% of a residual oil(bright stock) having a viscosity index of 80 to 90 and a viscosity at140 F. greater than 150 centistokes, 25% of a distillate oil having aviscosity index of to and a viscosity at 140 F. of 30 to 50 centistokes,30% of a slack Wax derived from a residual oil (bright stock) having apenetration unworked of 50 to mm./l0, an oil content of 025%, andacongealing point of 148 to 170 F., and 20% of a slack wax derived from adistillate oil boiling above 480 F., and having an oil content of 0-40%and a congealing point of to 150 F.

3. A petroleum jelly consisting of a mixture of 20% of a residual oil(bright stock) having a viscosity index of 80 to 90 and a viscosity atF. greater than centistokes, 20% of a distillate oil having a viscosityindex of-*65 to 80 and a viscosity at 140 F. of 30 to 50 centistokes,34% of a slack wax derived from a residual oil (brightstocklhavingapenetration unworked of 50 to 90 mm./ 10, an oil content of025%, and a congealing point of 143 to F., and 26% of a slack waxderived from a distillate oil boiling above 480'? F., and having an oilcontent 0f- 040% and a congealing point of 125 to 150 F.

1,920,161 Rosen,... a July 25, 1933 2,649,384 Anderson Aug. 18, 19532,661,318, MacLaren Dec. 1, 1953

1. A PETROLEUM JELLY CONSISTING OF A MIXTURE OF A RESIDUAL OIL (BRIGHTSTOCK) HAVING A VISCOSITY INDEX OF 80 TO 90 AND A VISCOSITY AT 140*F.GREATER THAN 150 CENTISTOCKES, A DISTILLATE OIL HAVING A VISCOSITY INDEXOF 65 TO 80 AND A VISCOSITY AT 140*F. OF 30 TO 50 CENTISTOCKES, A SLACKWAX DERIVED FROM A RESIDUAL OIL (BRIGHT STOCK) HAVING A PENETRATIONUNWORKED OF 50 TO 90 MM./10, AN OIL CONTENT OF 0-25%, AND A CONGEALINGPOINT OF 148 TO 170*F., AND A SLACK WAX DERIVED FROM A DISTILLATE OILBOILING ABOVE 480*F., AND HAVING AN OIL CONTENT OF 0-40% AND ACONGEALING POINT OF 125 TO 150*F., THE COMBINED AMOUNTS OF SAID RESIDUALAND DISTILLATE OILS AMOUNTING TO BETWEEN 40 AND 50% OF THE MIXTURE.